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# general

sparse-intern-71089

01/12/2022, 12:12 PM

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echoing-dinner-19531

01/12/2022, 12:37 PM

I think this type is missing the very obvious Bimap method. Which would let you write something like:

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input.Apply(union => union.Bimap(t0 => (U0)t0, t1 => (U1)t1));

As that doesn't exist yet you can use TryPick to get long hand version:

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input.Apply(union => {
    if (union.TryPickT0(out var t0, out var t1)) {
        return Union<U0, U1>.FromT0((U0)t0);
    } else {
        return Union<U0, U1>.FromT0((U1)t1);
    }
});

echoing-dinner-19531

01/12/2022, 12:44 PM

Actually I guess Match can do this as well:

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input.Apply(union => union.Match<Union<TResult0, TResult1>>(t0 => mapFunc0(t0), t1 => mapFunc1(t1)))

But a bimap function would be shorter and save those type annotations probably. Wonder if we should lift some of these methods to be directly on InputUnion as well

thousands-jordan-32051

01/12/2022, 2:32 PM

Thanks Fraser - yeah I got the Match which is nice, but the Apply returns an Ouput<Union<U0, U1>> but I can't figure out how to assign that to an InputUnion<U0, U1>

thousands-jordan-32051

01/12/2022, 2:35 PM

Bimap would be nice too though

echoing-dinner-19531

01/12/2022, 5:49 PM

Oh huh yeh InputUnion is missing some constructors/converters as well 😞 That's very dumb I'll get it fixed.

🙌 1

echoing-dinner-19531

01/12/2022, 6:16 PM

https://github.com/pulumi/pulumi/pull/8733

thousands-jordan-32051

01/13/2022, 9:48 AM

Amazing, thank you.

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